On Crossed Apraxia. Description of a Right-Handed Apraxic Patient with Right Supplementary Motor Area Damage

Marchetti, C.; Sala, Sergio Della

doi:10.1016/s0010-9452(08)70010-8

Cited by 47 publications

(22 citation statements)

References 70 publications

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“…The cluster labelled "handedness and limb praxis" cannot account for the cases reported by Marchetti and Della Sala (1997) and by Raymer et al (1999) who were both right-handed and both had a severe crossed apraxia. The cluster named "language and bucco-facial praxis" cannot accommodate the 48 % of patients with crossed aphasia but with no signs of face apraxia reported by the authors themselves.…”

Section: Discussionmentioning

confidence: 91%

Crossed right hemisphere syndrome following left thalamic stroke

2005

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In most right-handed people, language and motor functions are more reliant on systems of the left hemisphere while several non-linguistic visuo-spatial and attentional processes depend more on the right hemisphere. The rare exceptions to these rules provide important clues as to what functions co-lateralise, and are thus crucial for models of cerebral specialization. Here we report on the case of a patient, who, after a lesion restricted to the left thalamic region, showed signs normally associated with right hemispheric injury including motor impersistence, visuo-spatial dysfunction and poor comprehension of facial expression. Language abilities were spared and no signs of apraxia were present, in spite of his right hand, foot and eye preference, a pattern normally associated with conventional cerebral dominance. In spite of his other right hemispheric signs, the patient showed no signs of hemi-spatial neglect. The patient's pattern of spared and impaired abilities is compared and contrasted with other rare cases of crossed right hemisphere syndrome.

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Section: Discussionmentioning

confidence: 91%

Crossed right hemisphere syndrome following left thalamic stroke

2005

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“…Evidence is surprisingly scarce. While it is true that some left-handers do show signs of apraxia following right hemisphere lesions (Poeck & Kerschensteiner 1971;Valenstein & Heilman 1979;Dobato et al 2001), the same can be said for some right-handed patients (Marchetti & Della Sala 1997;Raymer et al 1999). On the neuroimaging side, left-handed participants do show greater recruitment of right parietal, frontal and temporal cortices than right-handers when listening to the sounds made by using handheld tools versus animals, and this might reflect automatic activation of right-lateralized praxis representations .…”

Section: Hand Dominance and Praxismentioning

confidence: 98%

Tool use, communicative gesture and cerebral asymmetries in the modern human brain

Frey

2008

Phil. Trans. R. Soc. B

162

119

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Determining the brain adaptations that underlie complex tool-use skills is an important component in understanding the physiological bases of human material culture. It is argued here that the ways in which humans skilfully use tools and other manipulable artefacts is possible owing to adaptations that integrate sensory-motor and cognitive processes. Data from brain-injured patients and functional neuroimaging studies suggest that the left cerebral hemisphere, particularly the left parietal cortex, of modern humans is specialized for this purpose. This brain area integrates dynamically representations that are computed in a distributed network of regions, several of which are also left-lateralized. Depending on the nature of the task, these may include conceptual knowledge about objects and their functions, the actor's goals and intentions, and interpretations of task demands. The result is the formation of a praxis representation that is appropriate for the prevailing task context. Recent evidence is presented that this network is organized similarly in the right-and left-handed individuals, and participates in the representation of both familiar tool-use skills and communicative gestures. This shared brain mechanism may reflect common origins of the human specializations for complex tool use and language.

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“…Left brain damage usually affects both hands, whereas right brain damage affects only the left hand, suggesting that the left hemisphere is fully competent for processing movement concepts and also contributes to the generation of movements in the right hemisphere. Apraxic deficits following left hemisphere lesions are also more frequent (De Renzi, Motti and Nichelli, 1980;Weiss, Dohle, Binkofski, Schnitzler, Freund and Hefter, 2001), however, in some rare cases, severe apraxia was observed following right hemisphere lesions (Marchetti and Sala, 1997;Raymer, Merians, Adair, Schwartz, Williamson, Rothi, Poizner and Heilman, 1999). The concept of crossed apraxia was introduced to describe patients with this opposite pattern of limb apraxia that cannot be explained by handedness.…”

Section: Contributions Of the Left And Right Brain Hemispheresmentioning

confidence: 99%

Apraxia: a review

Petreska

Adriani

Blanke

et al. 2007

Progress in Brain Research

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Praxic functions are frequently altered following brain lesion, giving rise to apraxia, a complex pattern of impairments that is difficult to assess or interpret. In this chapter, we review the current taxonomies of apraxia and related cognitive and neuropsychological models. We also address the questions of the neuroanatomical correlates of apraxia, the relation between apraxia and aphasia and the analysis of apraxic errors. We provide a possible explanation for the difficulties encountered in investigating apraxia and also several approaches to overcome them, such as systematic investigation and modeling studies. Finally, we argue for a multidisciplinary approach. For example, apraxia should be studied in consideration with and could contribute to other fields such as normal motor control, neuroimaging and neurophysiology.

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On Crossed Apraxia. Description of a Right-Handed Apraxic Patient with Right Supplementary Motor Area Damage

Cited by 47 publications

References 70 publications

Crossed right hemisphere syndrome following left thalamic stroke

Crossed right hemisphere syndrome following left thalamic stroke

Tool use, communicative gesture and cerebral asymmetries in the modern human brain

Apraxia: a review

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